The Day Wall Street Exploded

1. The Wall Street Bombing: An Unprecedented Act of Terror

On September 16, 1920, as the bells of Trinity Church chimed the noon hour, a bomb planted on a horse-drawn wagon exploded into the lunchtime crowd at Wall and Broad, shattering windows throughout the fi nancial district, killing thirty-eight people and wounding hundreds more.

A sudden, devastating blast. At 12:01 PM on a cloudy Thursday, a powerful explosion ripped through the heart of New York's financial district, turning the bustling corner of Wall and Broad streets into a scene of unimaginable carnage. Fire-packed air, metal shrapnel, and shattered glass rained down on the lunchtime crowd, instantly killing dozens and leaving hundreds wounded. The blast was so intense that skyscrapers three blocks away trembled, and the Morgan bank's ornate facade was stained with blood and pockmarked by flying debris.

Chaos and confusion. In the immediate aftermath, panic gripped lower Manhattan as survivors, dazed and injured, fled in all directions, some screaming for help, others simply trying to escape the unknown danger. Initial reports were wildly inconsistent, with witnesses describing smoke of various colors and the source of the blast as either above or below ground. The sheer scale of the devastation, coupled with the lack of clear information, created an atmosphere of profound dread, leaving many to wonder if it was "the end of the world."

An alarming new precedent. Until the Oklahoma City bombing in 1995, this was the worst act of terrorism in American history, marking a grim milestone in the nation's experience with political violence. The attack's indiscriminate nature, targeting a public space at its busiest hour, suggested a chilling new intent: to inflict maximum casualties and psychological terror rather than a specific assassination. This raised urgent questions about the vulnerability of American institutions and the potential for even larger attacks.

2. America's First Age of Terror: A History of Dynamite and Dissent

Throughout the late nineteenth and early twentieth centuries, newspapers were fi lled with reports of violent attacks on the symbols of American government and business: bombs mailed to mayors and governors, assassination attempts on presidents and capitalists, dynamite found beneath railroad tracks or outside the factory door.

A long tradition of violence. The Wall Street bombing, while shocking, was not an isolated incident but the culmination of decades of bitter political conflict and revolutionary terrorism in America. From the 1880s onward, the nation grappled with a "first age of terror," characterized by violent clashes between capital and labor, and the rise of militant groups advocating radical change. This era saw:

• The Haymarket bombing (1886)
• The Homestead strike (1892)
• The assassination of President William McKinley (1901)
• The McNamara dynamiting case (1910)

Dynamite as a weapon of the "have-nots." The invention of dynamite in 1866 transformed the ability of individuals to inflict mass destruction, becoming a potent symbol for those seeking to overthrow industrial capitalism. Revolutionary anarchists, in particular, embraced "propaganda by deed," believing that individual acts of terrorism could inspire broader revolt and strike fear into the hearts of the powerful. This tactic was seen as a justifiable response to the systemic violence of industrial capitalism, where thousands of workers died annually in accidents and strikes were often met with armed force.

The "anarchist menace." The image of the "bearded, foreign, bomb-throwing revolutionary anarchist" became a pervasive cultural and political trope, fueling widespread fear and calls for repression. This specter, often exaggerated, led to new laws aimed at containing radical and labor movements, including restrictions on immigration and political dissent. The Wall Street bombing, therefore, tapped into a deep-seated national anxiety about internal threats and the fragility of the social order.

3. The Rise of American Radicalism: From Anarchists to Wobblies

Most viewed the American plutocracy, with its massive fortunes and lack of accountability, as a far more dangerous class than European royalty.

Johann Most: The voice of terror. German immigrant Johann Most, arriving in New York in 1882, became the leading spirit of a small but vocal revolutionary anarchist movement. He didn't bring bombs, but he brought the powerful idea that dynamite could be used to strike fatal blows against capitalism and the state. His fiery rhetoric, published in Die Freiheit, targeted Wall Street's "money kings" and "monopolists," advocating "unrelenting, pitiless, thorough war of extermination!"

Emma Goldman and Alexander Berkman: Disciples of the deed. Inspired by the Haymarket executions, Emma Goldman and Alexander Berkman emerged as prominent anarchists, advocating violence as a means of liberation. Berkman's 1892 assassination attempt on industrialist Henry Clay Frick during the Homestead strike, though unsuccessful, was proudly labeled "the first terrorist act in America" by him. Their actions, and Goldman's subsequent lectures on "the psychology of political violence," kept the idea of the attentat alive in the public consciousness.

"Big Bill" Haywood and the IWW: American roughnecks. The early 20th century saw the rise of a distinctly American radicalism embodied by "Big Bill" Haywood, a one-eyed miner and leader of the Industrial Workers of the World (IWW), or "Wobblies." Haywood's brand of class militancy, born from the brutal realities of Western mining, embraced "direct action" and, implicitly, violence as a legitimate response to capitalist tyranny. His 1907 murder trial, where he was accused of dynamiting a former governor, became a national referendum on the capitalist system, with Socialist leader Eugene Debs famously declaring, "if an attempt is made to repeat it, there will be a revolution and I will do all in my power to precipitate it."

4. Wartime Repression: The Red Scare and the Crackdown on Dissent

The passage of the Espionage Act brought an escalation of the federal campaign against war dissenters, an unprecedented venture into regulating and punishing political opinion.

War intensifies domestic conflict. The outbreak of World War I in Europe and America's eventual entry in 1917 dramatically reshaped the domestic political landscape. The progressive ideals of free speech and social reform, which had gained traction in the pre-war years, quickly gave way to a darker, less tolerant outlook. The federal government, for the first time, took an active and aggressive role in suppressing dissent, viewing any criticism of the war effort or capitalism as treasonous.

Targeting "disloyal" elements. New legislation, such as the Espionage Act (1917) and the Sedition Act (1918), criminalized speech and political activity deemed to encourage draft resistance or undermine military operations. This led to:

• The jailing of thousands of war dissenters, including prominent figures like Emma Goldman, Alexander Berkman, "Big Bill" Haywood, and Eugene Debs.
• The banning of foreign languages in public schools and the transformation of "sauerkraut" into "liberty cabbage."
• Vigilante assaults and mob violence against suspected radicals and immigrants.

The Palmer Raids and mass deportations. The post-war period saw the "Red Scare" reach its peak, fueled by a wave of strikes and the May Day and June 2, 1919, bomb plots. Attorney General A. Mitchell Palmer, whose home was bombed, launched a campaign to purge the country of its "anarchist element." This culminated in the Palmer Raids, which rounded up thousands of foreign-born radicals, leading to the mass deportation of 249 individuals, including Goldman and Berkman, on the "Soviet Ark" in December 1919. This marked a profound shift, as the U.S. government declared a particular ideology "un-American" and abandoned its tradition as a haven for the politically oppressed.

5. The Chaotic Investigation: Bureaucratic Rivalries and Conflicting Theories

Despite his formidable reputation, Flynn knew he would face a challenge to his authority once he arrived.

A scramble for control. The investigation into the Wall Street bombing was immediately plagued by bureaucratic chaos and intense rivalries among various law enforcement agencies. William J. Flynn, head of the Bureau of Investigation (BOI), arrived from Washington eager to assert federal authority, but faced competition from:

• New York Police Commissioner Richard E. Enright and his bomb squad.
• Former Commissioner Arthur Woods, who had deep ties to the Morgan family.
• Private detective William J. Burns, who boasted of his "Great Detective" prowess.

Initial clues and conflicting interpretations. Investigators quickly identified key physical evidence: the remains of a horse-drawn wagon, hundreds of metal slugs, and a New Jersey license plate. However, interpretations varied wildly:

• Accident theory: The fire department and some police initially believed it was an accidental explosion of dynamite being transported to a nearby construction site.
• Bomb theory: Flynn and Burns quickly dismissed the accident theory, convinced it was a deliberate act of terrorism.
• "American Anarchist Fighters" fliers: The discovery of crudely stamped fliers threatening "sure death for all of you" if "political prisoners" were not freed solidified the bomb theory for many.

A frustrating lack of progress. Despite thousands of man-hours, hundreds of interviews, and meticulous collection of debris, the initial weeks yielded little definitive evidence. Witnesses offered contradictory accounts, and the body of the horse, a crucial clue, was accidentally sent to a rendering plant. The investigation became a public spectacle, with newspapers speculating wildly and agencies vying for credit, often undermining each other's efforts.

6. The Italian Anarchist Connection: Galleanisti as Prime Suspects

In Galleani and his disciples Flynn had identifi ed a group of militants who openly applauded individual acts of assassination and terror.

Luigi Galleani: The true heir of Most. Despite the public focus on more famous radicals, Flynn and the Bureau of Investigation quickly zeroed in on Luigi Galleani, a charismatic Italian anarchist. Galleani, a devoted advocate of "propaganda by deed," openly espoused revolutionary violence and published manuals like La salute è in voi! (Health Is Within You), detailing how to make and use explosives. His followers, the Galleanisti, were suspected in numerous pre-war and wartime bombings.

The June 2nd precedent. The Bureau's suspicion of the Galleanisti was heavily influenced by the June 2, 1919, nationwide bomb plot, which targeted government officials, including Attorney General Palmer. Evidence strongly linked the Galleanisti to this plot, particularly the discovery of the bomber's remains (identified as Carlo Valdinoci, a close associate of Galleani) and the distinctive pink "Plain Words" pamphlets, which were traced to Galleanisti printers.

Salsedo's death and the Sacco-Vanzetti link. The investigation into the June 2nd plot was derailed by the mysterious death of Andrea Salsedo, a Galleanisti printer held in federal detention, who allegedly committed suicide by jumping from a Bureau office window. This incident, which sparked accusations of police brutality, sent many Galleanisti underground. However, it also led the Bureau to Nicola Sacco and Bartolomeo Vanzetti, two Galleanisti who were arrested in Massachusetts for murder shortly before the Wall Street bombing. Flynn suspected they were the "political prisoners" mentioned in the Wall Street fliers, and that their comrades might have orchestrated the bombing in retaliation for their arrests.

7. The Russian Connection: A Fabricated Communist Plot

Burns believed that he had an ace in the hole.

Burns's alternative theory. While Flynn pursued the Italian anarchists, William J. Burns, upon becoming the new Bureau director in August 1921, shifted the investigation's focus to a "Russian Connection." Burns, a staunch anti-communist, believed that communists allied with Lenin's Third International were responsible for the Wall Street explosion, aiming to terrorize the capitalist system. This theory was based largely on the claims of a single informant, William Linde.

The informant's tale. William Linde, a Polish-Russian immigrant and known "stool pigeon," approached Burns with a story of a communist "technical committee" planning "something big" against capitalism. After the bombing, Linde claimed the Wall Street plot was hatched by this committee, financed by Ludwig Martens (the Soviet Bureau's unofficial ambassador), and carried out by operatives like "Stevens" and "Barber." Burns, despite his usual skepticism, invested heavily in Linde's story, even sending him to Russia to gather more evidence.

A spectacular collapse. Linde's mission, however, ended in public humiliation for Burns. In December 1921, Linde was arrested in Warsaw, and news reports revealed he was a paid informant for Burns. The "confession" he provided was widely discredited by the press and communist leaders, who pointed out that their ideology rejected individual terrorism. Linde's reputation as a "braggart" and "liar," combined with his wife's testimony that he was with her during the bombing, exposed the entire "Russian Connection" as a hoax, severely damaging Burns's credibility and the Bureau's reputation.

8. The Sacco-Vanzetti Trial: A Case Shaped by Bombing Hysteria

If we have to die for a crime of which we are innocent, we ask for revenge, revenge in our names and in the names of our living and dead.

Prejudice and perception. The Wall Street bombing, though unsolved, cast a long shadow over the Sacco-Vanzetti trial in Massachusetts, which began in May 1921. The relentless press coverage of the Ligi and De Filippis arrests, linking Italian anarchists to the Wall Street blast, fueled public prejudice against Sacco and Vanzetti. The presence of armed guards and the secret fortification of the courtroom against bomb attacks further reinforced the image of the defendants as dangerous terrorists, even though they were on trial for murder and robbery.

Anarchist identity on trial. While the Bureau's direct involvement in the Sacco-Vanzetti prosecution was peripheral, its ongoing surveillance of the Sacco-Vanzetti Defense Committee and its attempts to link the defendants to the Wall Street bombing contributed to the atmosphere of suspicion. Defense attorneys argued that Sacco and Vanzetti were being tried for their anarchist beliefs and Italian heritage, not for the Braintree murders. This narrative resonated with many, turning the case into a symbol of American injustice.

Martyrs for the cause. Despite their insistence on innocence in the Braintree murders, both Sacco and Vanzetti were passionate revolutionaries who embraced a militant vision of anarchism. As their execution became imminent in 1927, they urged their supporters to seek "revenge" in their names, echoing Galleani's calls for "propaganda by deed." This call was answered by a wave of bombings at American banks and embassies worldwide, and in U.S. cities, including New York, just weeks before their execution, forcing New Yorkers to once again confront the specter of anarchist terror.

9. The Unsolved Mystery: A Lingering Symbol of Failure

What came to a close with the Lerner arrest was not simply the Wall Street saga but the “story of dynamite” as it had been known to Americans for more than four decades, starting with Johann Most’s arrival on U.S. shores.

A case that defied resolution. The Wall Street bombing investigation ultimately failed to identify and prosecute a single perpetrator, becoming a towering symbol of law enforcement's inability to solve one of the nation's most devastating acts of terror. Despite years of effort, numerous arrests, and conflicting theories, the case remained officially unsolved. This lack of closure allowed various factions to shape its meaning according to their own agendas:

• Critics of the Red Scare: Argued the bombing was either an accident or a fabrication, used to justify government overreach and "hysteria."
• Law enforcement: Privately maintained belief in anarchist or communist culpability, but lacked definitive proof.
• The public: Gradually forgot the details, leaving the pockmarks on the Morgan bank as a silent, unexplained reminder.

The "Wall Street curse." The investigation seemed plagued by a "curse," with every promising lead collapsing into embarrassment or dead ends. Informants like Linde were exposed as frauds, witnesses proved unreliable, and suspects like Ligi and De Filippis were released due to lack of evidence or airtight alibis. The constant infighting and lack of cooperation between federal and local agencies further hampered progress, turning the hunt for the bomber into a bureaucratic quagmire.

A deliberate act of forgetting. By the mid-1920s, there was a collective impulse to erase and minimize the memory of the Wall Street explosion. Neither the investigators, the suspects, nor the financial elite had an interest in preserving the memory of an event that had caused so much embarrassment, fear, and grief. This deliberate forgetting contributed to the bombing's enduring mystery, allowing it to fade from national consciousness even as its impact on American politics and law enforcement lingered.

10. The Roaring Twenties: Prosperity Built on Suppressed Dissent

The galloping success of American capitalism in the 1920s rested to some extent on the successful repression of available alternatives that had taken place in the preceding years.

The decline of terrorism. The mid-1920s marked a significant lull in bombings and assassinations as a weapon of class warfare, a stark contrast to the preceding decades. This decline was due to several factors:

• Communist dominance: The Soviet-led communist movement, which largely rejected individual terrorism, marginalized anarchists and syndicalists.
• Red Scare's impact: Palmer's deportation policies, despite their controversial nature, effectively drove many revolutionaries underground or out of the country.
• Immigration restrictions: The 1924 immigration quotas, targeting regions suspected of harboring radicals, severely limited the influx of foreign-born militants.
• Labor reforms: The eventual federal protections for labor in the 1930s addressed many of the grievances that had fueled earlier violence.

Capitalism's triumph. The "Roaring Twenties" saw American capitalism achieve unprecedented prosperity, becoming the envy of the world. This economic boom coincided with the marginalization of capitalism's critics. The language of "plutocrats" and "Money Trust" largely disappeared from national discourse, replaced by a celebration of "Americanism" fused with business success. The House of Morgan, once a target of intense hatred, operated openly as a financial and strategic center of American "dollar diplomacy."

Hoover's enduring legacy. Of all the key players in the Wall Street investigation, J. Edgar Hoover emerged with his power enhanced. After the scandals of Burns and Daugherty, Hoover, initially appointed as a reformer, systematically rebuilt the Bureau of Investigation (later the FBI). While initially curtailing overt anti-radical intelligence gathering, he remained convinced of a subversive threat. By the late 1930s, he revived the General Intelligence Division and secured the Smith Act, which criminalized advocating the overthrow of the government by force. This laid the groundwork for the FBI's enduring role in combating perceived domestic threats, a direct legacy of the Red Scare and the unsolved Wall Street bombing.